Booster seat



FIG. 1 is a top perspective view of a booster seat according to the design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a side view thereof;

FIG. 6 is another side view thereof;

FIG. 7 is a rear view thereof; and,

FIG. 8 is a front view thereof.

The broken lines in the drawings illustrate environmental subject matter only and form no part of the claimed design. 

CLAIM The ornamental design for a booster seat, as shown and described. 